Adding store policies is a great way to communicate to your customers the policies you have in place for shipping, refunds, privacy etc.
Adding an About us page is a nice way for you to tell the story of your business to your customers and help them connect to your brand.
I also wanted to recommend Shopify Learn; it is a really great resource we offer on all things Shopify. It is really helpful for learning different areas such as marketing, branding, store design and a lot more.
Let me know if you have any questions and best of luck with your business!
Emily | Social Care @ Shopify - Was my reply helpful? Click Like to let me know! - Was your question answered? Mark it as an Accepted Solution - To learn more visit the Shopify Help Center or the Shopify Blog